Smoke-stack



A. STAPLES.

Smoke Stack.

I No. 230,673.

Patented Aug. 3,1880.

sses.

MFETHS, PHOTD-LITHOGRAPHER, WASHINGTON. D. G

UNITED STATES PAT NT OFFICE.-

ARTHUR STAPLES, OF LOWELL, MASSACHUSETTS.

SMOKE-STACK.

SPECIFICATION forming part of Letters latent No. 230,673, dated August 3, 1880.

Application filed J annary 10, 1878.

To all whom it may concern.-

Be it known that I, ARTHUR STAPLES, of

1 Lowell, in the county of Middlesex and Comand Fig. 2 is a sectional view of a part of the tube, ring, and hood.

A A A A A represent sections of burntclay tubing, each section being flanged at the top to receive the lower end of the section next above, as shown, the continuous tubing thus formed being surmounted by a suitable cap, B,andresting upon the ring 0. Said ring is supported by metallic rods D attached to the root E of the engine-house, is of castiron, and of the form shown in Fig. 2, and is provided on top with the flange F, near its inner edge. Said fiangeF surrounds the bottom of the'lower section of tubing, A, and holds said section in its place upon the ring. The under side of the ringO is beveled downward and outward to receive the conical hood G, the latter being secured by bolts to said ring. This hood is formed of cast-iron, and is best made in radial sections fastened together by bolts, rivets, or otherwise. Below said hood are the usual annular gutter H and the conductor-pipes I l, to receive and carry away the moisture which condenses in the tubing and hood and drips from the lower edge of the latter. L L are guys.

The tubing, as above stated, and the hood are usually constructed of wrought-iron, and are so corroded by the acids generated by the burning of wood and soft coal that they are useless in a short time-say in two or three years. These acids will not, however, produce any effect upon the clay tubing, while the hood above described, being of cast-iron, is much less aii'ected by said acids and will last much longer than it made of wrought-iron, and the hood being in sections, one or more of the sections can be removed and a new one substituted without destroying or taking down the entire hood.

The first cost of a stack constructed by my method is much less than that of the ordinary stack, and parts of it are absolutely iucorrodible by the acids to which it will be subjected in use. Besides, the wrought-iron stack ought to be painted twice a year, and is usually painted when first put up and as often as once a year thereafter; but mine needs no painting at any time.

I claim as my invention- The combination of the tubing A A A" A' A, the hood G, and the ring 0, as and for the purpose specified.

ARTHUR STAPLES.

W'itnesses:

ALBERT M. MOORE, IRVING S. PORTER. 

